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Bio 172 Exam 2 with verified solutions

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Bio 172 Exam 2 with verified solutions

Institution
BIO 172
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BIO 172









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Institution
BIO 172
Course
BIO 172

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Uploaded on
April 14, 2025
Number of pages
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Written in
2024/2025
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Bio 172 Exam 2 with verified
solutions

What are three ways energy is extracted from glucose? - correct answer
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




✔Glycolysis, Citric Acid Cylce, Oxidative Phosphorylation |||||| |||||| |||||| |||||| ||||||




What enzyme in the investment phase of glycolysis is responsible for cosumeing
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




ATP to break down carbohydrates? - correct answer ✔Phosphofruktokinase
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




How many binding sites does phosphfruktokinase have? What binds there? -
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




correct answer ✔It has a regulatory and active site. Both bind to ATP.
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




When ATP binds at phosphfruktokinase's regulatory site, what happens to the
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




reaction rate? - correct answer ✔It decreases, ATP inhibits phosphfruktokinase|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Feedback inhibition - correct answer ✔When the product of a sequence of |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




reactions can be used to allosterically inhibit on of the enzymes catalyzing the |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




reaction.
Phase 1 Glycolysis - correct answer ✔The energy investment phase. Two ATP
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




are consumed. Fructose-1,6-Biphosphate is the product.
|||||| |||||| |||||| |||||| ||||||




Phase 2 glycolysis - correct answer ✔The Cleavage phase. Fructose-1,6-
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Biphosphate is cleaved into two glyceraldehyde-3-phosphates. No ATP |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




consumption.
Phase 3 Glycolysis - correct answer ✔The Payoff phase. 2 NADH and 4 ATP
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




produced. Pyruvate formed. |||||| ||||||




Net Products of Glycolysis - correct answer ✔2 Pyruvate
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




2 NADH ||||||




2 ATP ||||||

, How is ATP created in Glycolysis? - correct answer ✔Substrate Level
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Phosphorylation
Substrate Level Phosphorylation - correct answer ✔The use of a chemical |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




substrate to transfer a phosphate directly to an ADP molecule and form ATP.|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Net Equation for Glycolysis - correct answer ✔C₆H₁₂0₆ + 2 NAD⁺ + 2 ADP + P → 2
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Pyruvate + 2 NADH + 2 H⁺ + 2 ATP |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Where does Glycolysis Occur? - correct answer ✔The Cytosol
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Where does pyruvate go what oxygen is present? - correct answer ✔To Acetyl-
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




CoA synthesis and then to the Citric Acid Cycle
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Where does pyruvate go when oxygen isn't present? - correct answer ✔To
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




fermentation
How is glycolysis linked to the citric acid cycle? - correct answer ✔Acetyl-CoA
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




synthesis
What are the products of Acetyl-CoA synthesis? - correct answer ✔2 Acetyl-CoA
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




2 CO₂
||||||




2 NADH
||||||




Starting materials for Acetyl-Coa Synthesis - correct answer ✔2 Pyruvate
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




2 NAD⁺
||||||




2 Coenzyme A
|||||| ||||||




Where does Acetly-CoA synthesis take place? - correct answer
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




✔Intermembrane Space ||||||




What is the Purpose of the Citric Acid Cycle? - correct answer ✔To extract
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




energy from pyruvate and form high energy electron carriers
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Where does the citric acid cycle occur? - correct answer ✔Mitochondrial Matrix
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




(Eukaryotes)
Cytosol (Prokaryotes) ||||||




Products of Citric Acid Cycle - correct answer ✔6 NADH |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||

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